Yarn-tension device for



(No Medal.) 2 Sheets-Sheet 1.

W. M. ROBINSON.

YARN TENSION DEVICE FOR RING SPINNING FRAMES.

N0. 283,663. Patented Aug. 21, 1883.

N. PETERS. PAMa-Ulhogmphan Washingrau. an

(No Model.) 2 Sheets-Sheet 2.

W. M. ROBINSON.

YARN TENSION DEVICE FOR RING- SPINNING FRAMES. No 283,663. Patented Aug.21, 18:83.-

N, PC1818. Pnulo-Lillwgmphlr. Washingmm a. c

Niin grains "Farrier ,FFECEQ WILLIAM ill. ROBlNSON, OF PETERSEURG,VIRGINIA.

SPECIFICATION forming part of Letters Patent no. ceases, dated August21, 1883.

Application filed November 3, 183 (X model.)

' a citizen of the United States, residing at Petersburg, in the countyof Dinwiddie and State of Virginia, have invented certain new and usefulImprovements in Yarn-Tension Devices for Ring-Spinning Frames; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the artto whichit appertains to make and use the same, reference beinghad to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

In ring-spinning machines of usual construction difficulties areencountered in regulating the tension of the yarns or threads, and inpreventing the same from lashing against one another. I

It is a well-known fact that the tension of the thread and the velocityof the traveler vary according to the angle of said thread to thetraveler, which angle varies according as the yarn is run from thesmaller to the greater diameter of the bobbin and as the bobbin fills.Various attempts have heretofore been made 'to overcome this diiiicultyand regulate the tension of the yarn or thread; but all devices for thispurpose that have come to 'inyknowl' edge fail to entirely remedy thedifficulty.

The object of this invention is to providea means within the control ofthe operator whereby he is enabled to regulate the resistance thetraveler meets in its rotation around the ring, and consequently thetension of the thread or yarn at any time from the doiiingof the bobbinsuntil the latter are full; and to that end the invention consists,generally, in the means for regulating the tension of the thread or yarnin ring-spinning frames by the application directly to the traveler of ayielding or resilient power; and it further consists in the details ofconstruction and the arrangement of mechanism whereby the desiredresults are ob tained. I

In the accompanying drawings, Figure 1 is an elevation, Fig. 2 a planView, Fig. 3 a sectional side elevation, of'so much of a ringspinningframe as is necessary to illustrateiny invention; and Fig. 4 is adetached isometrical view, showing the lifting-rail rings and theimproved traveler-brakes, and mechanism for applying the brakes andadjusting them relatively to the rings.

Like letters of reference indicate like parts wherever such may occur inthe above figures of drawings.

S is thespindle, B the bobbin, L the lifting or ring rail, R the rings,and 'l. the travelers,

all of any usual or preferred construction.

lhe ring-rail is provided with two or more bearings, in which is mountedthe operating rod A for the brakes, by means of which the resistance thetravelers meet with in their rotation is modified or regulated. Thesebearin gs are preferably formed of retangular brackets D D, in thevertical arin d of which the operatingrod A is rotatably and adj ustablymounted. ihe rod A terminates in a crank or operating lever, a, andcarries at that end, on opposite sides of the outerbearing, D, twoadjusting-collars, G, engaging with suitable screw-threads formed on therod. By means of these collars the rod A can be adjusted longitudinallyin its bearings D D, as plainly shown in Fig. 4. Upon the rod aremounted the friction brakes, one for each traveler. These brakes consistof a thin steel leaf-spring, E, secured to a bearing-block, 6, carriedby the rod A, and adj ustably secured thereto by means of a set-screw,e, the free ends of which springs rest upon the ring-rail. In thismanner the brakes are adjustable independently of one another upon therod relatively to the travelers and rings, and they are made adjustable,collectively, relatively'to said travelers and rings by adjusting therod longitudinally of the rail L in its bearings, features which arealso more plainly shown in Fig. 4.

The rod A being free to rotate in its bearings, all the brakes may bemoved out of the way when the bobbins are to be doffed, as

shown indotted lines in said Fig. 4.

The independent adjustment of the brakes is of some importance, as Ihave found that the resistance which the travelers meet with in' theirrotation varies slightly-variation which is due, probably,to thedifference in the winding of the thread of the several bobbins andbythis means the brakes maybe adjusted with great nicety on the rod, soas to obtain a uniform action of the brakes upon all the travelers.

The tension of the thread or yarn is adjusted by moving the spring Ecloser to or farther away from the traveler within certain limits, so asto cause it to bear more or less upon the traveler as it passes betweenthe spring and ring, thereby breaking its momentum and regulating thetension of the thread as the circumstances may require. For instance, ifthe speed of the traveler is that required to maintain the propertension of the thread or yarn at the start, and this speed increases asthe bobbins begin to fill, the brakes are applied to sufficientlycounteract the resistance the traveler meets with in its rotation, andmaintain the proper tension. In this manner the regulating of thetension is entirely within the control of the operator.

I am aware that brakes have heretofore been employed for the purposesherein stated, and that such brakes have been made adjustable. These,however, were made of a rigid material, and I have found that they donot answer the purposes for which they were intended, for the reasonthat at each contact of the traveler with the non yielding brake saidtraveler is caused to recoil, thus disturbing, instead of regulating,its movements, which is not the case with the yielding or resilientbrake which forms the subject-matter of this invention.

Having now described my invention, what I claim is 1. The combination,with a ring-rail, ring, and traveler of a ring-spinning machine, of ayielding or resilient brake and means for adj usting the same, wherebythe said brake may be caused to exert a greater or less amount ofresistance upon the traveler to regulate the tension of the thread, asdescribed, for the purposes specified.

2. The combination,with the ring-rail, rings, and travelers of aring-spinning machine, of the pivoted rod A, means for adjusting thesame longitudinally, of the rail and the yielding or resilient brakes E6, arranged for application to the travelers to regulate the tension ofthe thread, substantially as described.

3. The conibinatiomwith the ring-rail, rings, and travelers of aringspinning machine, of the pivoted rod A, means for adjusting the samelongitudinally, of the rail and the yielding or resilient brakes E 6,adapted to be ad \VM. M. ROBINSON.

Witnesses: V

ALEX. HAMILTON,

ALEXANDER DONNAN.

